Yarn-supporting body member

ABSTRACT

Yarn-supporting body member comprising an external wall and an internal hub. The external wall is carried by the hub through ribs or the like projecting from said wall, or from said hub, or a material filling the gap between the wall and hub. The deformations as induced by the yarn wound up on the external wall will transmit a stress to the hub, without deforming the latter.

I United States Patent 1 1 3,561,698

[72] Inventor Francesco Steffenini [56] References Cited Via Pilli Milan. Italy UNITED STATES PATENTS l2 l 1 1 2,967,026 l/l96l Van Deventer Ill 242/1 18.32X [221 5' e d F 1 1971 3322.373 5/1967 Wilson Jr. et a1. 242 1 18.7 [45] l l' e 2,682,380 6/1954 Caldwell et a1. 242/1 18.61 [32] Pnonty May 12, 1967 I 33 1 My FORElGN PATENTS [3] 16026A/67 700,752 12/1953 Great Britain 242/] 18.32

Primary Examiner-George F. Mautz 541 YARN-SUPPORTING BODY MEMBER Atmmeksembflg Blake 8 Claims, 1 1 Drawing Figs.

[52] U.S.Cl ..242/ll8.31, ABSTRACT: Yam-supporting body member comprising an 242/46.21 external wall and an internal hub. The external wall is carried [51] Int. Cl B65h 75/10, by the hub through ribs or the like projecting from said wall, B65h 75/30 or from said hub, or a material filling the gap between the wall [50] Field of Search ..242/] 18.32, and hub. The deformations as induced by the yarn wound up 118.31, 118.3, ll8.7,46.2,46.21, 118.4, 118.8, ll8.62,ll8.61, 118.6

on the external wall will transmit a stress to the hub, without deforming the latter.

YARN-SUPPORTING BODY MEMBER This invention relates to a yam-supporting body member, and more particularly a composite supporting body member comprising an external wall and an internal hublike member.

As known, generally in textile industry, the yarns either as threadlike or weblike materials are wound up onto internally hollow supporting body members, such as cylindrical tubes, conical reels or spools; the yarn is wound up onto the external surface of the above members which, for yarn winding up or off, are slipped on shafts, such as spindles, allowing or imparting thereto a rotary motion about a stationary axis, such shafts forming part of machines well known in the art.

On rotation of each supporting body member about the above stationary axis, it is highly desirable that the axis of the supporting body member be coincident with the axis of rotation, that is substantially coincident with the axis of the spindle on which said body member is mounted, so as to prevent the high-speed rotating body member from transmitting to the relative spindle such vibrations or deflections which would cause a ready overheating of the spindle and failure thereof. Should the axis of the supporting body member not maintain an accurate univocal position with respect to the spindle axis, the yarn being wound up onto the body member would be unevenly or randomly distributed with an irregular winding which could even prevent praticably utilizable windings from being obtained.

In order to provide that a supporting body member, as mounted on a spindle, will maintain an accurate univocal position on rotation, it is therefore required that said body member be slipped on with its inner surface adherent to the external surface of the spindle at one or more locations. To those skilled in the art it is also known that the yarn, particularly when of a synthetic nature, on being wound up onto a supporting body member will exert thereon a pressure, enhanced by the resilient contraction in the yarn turns, tending to deform said body member both in a radial and axial directions. The result of any radial deformation resides in that said supporting member will shrink and jam onto the spindle on which, for the foregoing reasons, it is adheringly mounted; on winding up completion, the removal under these circumstances of the supporting body member would be therefore considerably hindered or substantially avoided. As a result of any axial deformation, in which the several cross sections of the supporting body member can be no longer coaxial to one another, said supporting body member could miss its coaxiali ty with the spindle on which it is mounted. Since it has been formerly disclosed that the supporting body member should be mounted with its internal surface adherent as possible to the external surface of the spindle, it will be apparent that to avoid the disadvantages, as briefly mentioned, particularly to avoid a jamming of the supporting body member on the spindle, at least at the contacting locations with the spindle said internal surface of the supporting body member should not undergo any unacceptable deformations. For this purpose, the supporting body members of the prior art are carried out with a wall having a cylindrical or conical external surface, which wall has to be indeformable in operation and capable of withstanding the stresses being transmitted by the wound-up yarn; for this purpose, in known supporting body members said wall is the resistant structure, in which the material mass making up the same is substantially evenly distributed along the whole wall of the body member.

Conventional supporting body members, in which it is desired that no axial deformations occur as previously mentioned, are made with only one resistant wall, which means that any radial deformation by wall buckling would cause a jamming of the body member on the spindle. In order to avoid such a drawback, conventional supporting body members are made with highly thick walls and very resistant materials, such as steel, and are of a very high weight and cost. The weight also affects all the handling and transportation operations and prevents high speeds of rotation from being obtained in the machines in which the yarn winding up or off is carried out. As

a result, it is a common practice to recover the supporting body members, recovery which together with maintenance. storage, transportation and management of said body members would weigh heavily on the yarn cost.

Generally, the textile industry is since long trying to provide the so-called type of discard-supporting body members, that is lightweight and low-cost supporting body members. Therefore, attempts were made to provide supporting body members having reduced amounts of not valuable quality material, but no satisfactory results were achieved because of the necessity of resorting to an oversizing in the body members to prevent such body members from being axially or radially deformed by wound-up yarn. From an accurate consideration of the matter it was found that the above drawbacks of conventional supporting body members ensue from being said body members made of'a single wall, on the outer sura surface of which the yarn is wound up. and to which the whole function of withstanding yarn stresses is committed, with the centering and positioning member on the spindle being fast with said wall, so that any deformation of the wall results in a change of position for the supporting body member relative to the spindle, thus inhibiting a correct operation. lt is for this that according to the prior an only a considerable mass of the supporting body member can assure an indeformability of said body member for a correct and satisfactory use.

Therefore, it is the main object of the present invention to provide a yamsupporting body member which is of a low weight and cost, capable of being mounted on a driving spindle with an extremely reduced clearance to maintain an accurate and steady rotation position, which on winding up completion can be readily slipped off of the spindle, and which on spindle rotation will rotate about the spindle axis without creating the above mentioned consequences.

It is another object to provide a so-called discard type of supporting body member.

The above and other objects are attained according to the present invention by dividing the mass or body of the supporting body member into two separate bodies, an internal body intended to be mounted on the spindle and being effective to maintain coaxiality of the supporting body member with the spindle, and an external body for supporting the yarn material. Thus, should the external body be deformed on yarn winding up, this deformation would not adversely affect supporting body member rotation and yarn winding up operation, as said outer body will take up the restraint imparted thereto by the internal body, or will maintain an acceptable rotation position as defined with respect to space. On the other hand, the single deformation of the outer body alone will not adversely affect since the yarn, which is a resilient medium, always provides new bearing surfaces for the yarn as the winding up of said yarn proceeds.

The supporting body member according to the invention is characterized by comprising an external wall and an internal hublike member, the external wall being supported by the hublike member through projections or a material filling the gap between said hublike member and external wall, the hublike member being internally hollow and capable of being slipped and coupled on a spindle so as to substantially contact said spindle at at least two locations axially spaced apart from each other.

ln order that the structure and features of the supporting body member provided with an internal hublike member be more clearly understood, some embodiments thereof will now be described, by mere way of example and not of limitation, reference being made to the accompanying drawings in which:

HO, 1 is a fragmentary, schematic axial sectional view showing a first embodiment of the supporting body member;

FIG. 2 is a cross section taken along line ll-ll of FIG. 1',

H65. 3 and 4, 5 and 6, 7 and 8, and 9 and 10 are fragmentary, schematic axial sectional views showing various embodiments of supporting body members and, respectively, a cross section for each of then; and

FIG. 11 is a detailed axial sectional view showing the lower portion of a further embodiment of the supporting body member.

Referring first to FIGS. I and 2, it will be seen that the supporting body member shown therein comprises an integral external wall 1 and an internal hublike member 2. External wall I internally has a spirallike continuous finning 3 between the free ends of which said hublike member 2 is forced. Wall 1 is made of plastic material, for example, while hublikc member 2 can be of metal. Externally of said wall I the shape for a yarn winding 4 is outlined and the supporting body member is shown as mounted on a driving spindle 5 forming part of a spinning machine, not shown for simplicity. As for most of usual spindles, the spindle shown in FIG. I has an enlargement 6 adjacent its bottom portion and at the lower end is provided with driving or dragging teeth 7 with which said finnings 3 will engage for rotatably driving said supporting body member. At the top said hublike member 2 has a groovelike depression 8 which, when the supporting body member is inserted on the spindle, encloses the top end of said spindle, while the lower portion of the hublike member is adherent to the spindle at the upper portion of enlargement 6 thereof. By such a structure for the supporting body member, even if the wound-up yarn should cause a deformation of wall 1, this deformation would 1 t damage said hublike member 2 and therefore the supporting body member together with the yarn can freely rotate with the spindle about the spindle axis, without undergoing any vibrations, and can be readily slipped off of said spindle on winding up completion.

The supporting body members shown in the other FIGS. of the accompanying drawings exhibit quite similar structural and functional features.

Particularly, the supporting body member of FIGS. 3 and 4 comprises an external wall formed of an internally hollow cylindrical tubular body and a hub 10 having continuous spiral finnings II at its external surface, on which finnings said wall 9 is carried. Teeth 7 of spindle engage within notches provided at the lower end of hub 10 which, similarly to hublilte member 2 described in connection with FIGS. I and 2, is held at a centered and accurate steady position on the spindle by contacting it at its upper end, enlargement 6 and its lower end.

The embodiment of the supporting body member shown in FIGS. 5 and 6 is substantially similar to the preceding embodiments, differing therefrom in that the cylindrical external wall 12 is made fast with hub 13 through a material 14, such as foamed plastic material, filling the gap between said hub 13 and wall 12.

In the embodiment of FIGS. 7 and 8 the supporting body member comprises an external wall 15 having spirallike finnings 16, as for wall I of body member in FiG FIGS. 1 and 2, and an internal hub 17 carried on finnings l6 and of a substantially tubular configuration having an inward enlarged upper end 18.

The supporting body member of FIGS. 9 and 10 is similar to that of FIGS. 3 and 4, and comprises an external tubular cylindrical wall 19 and an internal hub 20 having on its external surface a series of ribs 2i and 22 defining recesses 23, 243, respectively, of a substantial rectangular or respectively circular configuration.

Finally, referring to FIG. Ill it will be seen that the axial sec tion is shown therein for only the lower portion of a supporting body member as comprised of an external wall 25 internally having longitudinal finnings 26, and a tubular hub 27 carried on said finnings 26. As shown in the FIG., the lower portion of wall 25 is inwardly bent and therein those notches are provided with which said spindle teeth 7 engage for rotatable driving. It is evident that the lower portion of wall 25 could as well not be inwardly bent, that is, said wall can be quite cylindrical; in this case, teeth 7 can engage the lower portion of finnings 26.

It is a common feature in the disclosed embodiments that the external wall, on which the yarn is wound up, is separate from the hub forming the centering and securing element for the supporting body member on the driving spindle. The external wall and hub are bound to each other through projections or a filling material, or still other means, but in any case the external wall will be suitable to endure part of the stress being transmitted thereto by the wound up yarn and releasing the other part on the hub. It is important'to point out that this yarn stress can cause a deformation, and particularly a contraction of the external wall, without affecting for this the capability of the supporting body member to slip off of the spindle. On the contrary, the contraction of the external wall will enable the turns of the wound up yarn to resiliently shorten so as to provide for a less compressed winding than in the prior art.

The residual stresses being transmitted from the external wall to the hub are endured by said hub which will not jam on the spindle and also maintain a correct linearity binding the external wall at an acceptable accurate rotation position relative to the spindle axis.

As an important result of constructions shown is that the external can be made of not valuable materials or, however, by somewhat reduced amounts of material, it being of no significance that said external wall is slightly deformed by the yarn turns. The internal hub can also be made of a wide range of materials, such as metals and plastic materials, having only to be suitable to withstand the residual stresses being transmitted thereto by the external wall, without affecting its features of correct rotation and free removal.

It is evident that the internal hub can be made of such a con figuration as to contact the spinning machine spindle at more than two locations axially spaced apart from one another, and that at each of such locations the contact between the hub and spindle can occur at various spots rather than along entire surfaces.

Finally, it should be noted that the driving of the supporting body member through the teeth at the bottom portion or base of the spindles for spinning machines can occur either by engagement of said teeth with the external wall or by engagement of said teeth with the internal hub.

I claim:

1. A yarn-supporting assembly comprising an external tubular wall and an internal tubular hub coaxially arranged within and spaced from said external wall, the latter having an interior surface directed toward said hub and said hub having an exterior surface directed toward said interior surface of said wall, and means integral with one of said surfaces and extending toward the other of said surfaces for maintaining said wall and hub at a given distance from each other with said external wall surrounding said hub, said means including a series of annular portions all surrounding the common axis of said external wall and hub and distributed along said axis, said means being integral with the exterior surface of said hub.

2. A yarn-supporting assembly comprising an external tubular wall and an internal tubular hub coaxially arranged within and spaced from said external wall, thelatter having an interior surface directed toward said hub and said hub having an exterior surface directed toward said interior surface of said wall, and means integral with one of said surfaces and extending toward the other of said surfaces for maintaining said wall and hub at a given distance from each other with said external wall surrounding said hub, said means including a series of annular portions all surrounding the common axis of said external wall and hub and distributed along said axis, said means forming a continuous fin of spiral configuration.

3. The combination of claim 2 and wherein said fin is integral with said external wall.

4. The combination of claim 2 and wherein said fin is integral with said hub.

5. A yarn-supporting assembly comprising an external tubular wall and an internal tubular hub coaxially arranged within and spaced from said external wall, the latter having an interior surface directed toward said hub and said hub having an exterior surface directed toward said interior surface of said wall, and means integral with one of said surfaces and extending toward the other of said surfaces for maintaining said wall 6. The combination of claim 5 and wherein said recesses arc and hub at a given distance from each other with said external i Surrounding Said said means including a Series of '7. The combination of claim 5 and wherein said recesses arc nular portions all surrounding the common axis of said exterrectangular.

i n hub and dismbumfi alqng salqmeans 5 8. The combination of claim 5 and wherein said means is including axially extending portions in addition to said annular portions, and said axial and annular portions of said means defining recesses.

tcgral with said hub. 

1. A yarn-supporting assembly comprising an external tubular wall and an internal tubular hub coaxially arranged within and spaced from said external wall, the latter having an interior surface directed toward said hub and said hub having an exterior surface directed toward said interior surface of said wall, and means integral wiTh one of said surfaces and extending toward the other of said surfaces for maintaining said wall and hub at a given distance from each other with said external wall surrounding said hub, said means including a series of annular portions all surrounding the common axis of said external wall and hub and distributed along said axis, said means being integral with the exterior surface of said hub.
 2. A yarn-supporting assembly comprising an external tubular wall and an internal tubular hub coaxially arranged within and spaced from said external wall, the latter having an interior surface directed toward said hub and said hub having an exterior surface directed toward said interior surface of said wall, and means integral with one of said surfaces and extending toward the other of said surfaces for maintaining said wall and hub at a given distance from each other with said external wall surrounding said hub, said means including a series of annular portions all surrounding the common axis of said external wall and hub and distributed along said axis, said means forming a continuous fin of spiral configuration.
 3. The combination of claim 2 and wherein said fin is integral with said external wall.
 4. The combination of claim 2 and wherein said fin is integral with said hub.
 5. A yarn-supporting assembly comprising an external tubular wall and an internal tubular hub coaxially arranged within and spaced from said external wall, the latter having an interior surface directed toward said hub and said hub having an exterior surface directed toward said interior surface of said wall, and means integral with one of said surfaces and extending toward the other of said surfaces for maintaining said wall and hub at a given distance from each other with said external wall surrounding said hub, said means including a series of annular portions all surrounding the common axis of said external wall and hub and distributed along said axis, said means including axially extending portions in addition to said annular portions, and said axial and annular portions of said means defining recesses.
 6. The combination of claim 5 and wherein said recesses are circular.
 7. The combination of claim 5 and wherein said recesses are rectangular.
 8. The combination of claim 5 and wherein said means is integral with said hub. 